Time：2024-12-28Views：2
It is reported that Sinopec's "Deep Earth Engineering Sichuan Chongqing Natural Gas Base" has made another important breakthrough. The newly added 55.159 billion cubic meters of proven geological reserves of natural gas in Sinopec's Tongnanba gas field have been successfully approved by the Ministry of Natural Resources. Thus, the cumulative submitted proven geological reserves of natural gas in the gas field have reached 106.6 billion cubic meters, becoming another billion cubic meter gas field in the Sichuan Basin, which has a positive significance for ensuring national energy security.
The Tongnanba gas field is located in Bazhong City, Sichuan Province, belonging to the northern Sichuan region. The main target layer is the tight sandstone of the continental Xujiahe Formation, with a burial depth of 3500 to 5500 meters. The structure is complex, the reservoir is thin, and the lithology is tight. It is a typical deep ultra deep tight sandstone gas reservoir, and exploration and development are difficult.
For many years, researchers from Sinopec Exploration Company have been continuously conducting research on tight sandstone, innovating and forming the theory of oil and gas accumulation and enrichment in tight sandstone under complex structural conditions, as well as precise prediction technology sequences for thin reservoirs. They have accurately implemented the "double sweet spot" oil and gas enrichment high-yield zone and achieved new breakthroughs in old strata. On the other hand, in response to the problem of low production and difficulty in utilizing reserves in the early testing of tight sandstone in complex structural areas, the research team adopted unconventional thinking, accelerated engineering process iteration and upgrading, tackled large-scale volume fracturing technology, continuously optimized engineering parameters and construction procedures, and continued to explore drilling of high angle and horizontal wells. The daily production of single well testing gradually increased from 30000 cubic meters in the early stage to a maximum of over 300000 cubic meters. During the 14th Five Year Plan period, the proven geological reserves quickly exceeded 100 billion cubic meters, supporting the large-scale increase in continental natural gas reserves and production in northern Sichuan.
Wang Wei, Deputy Chief Geologist of Sinopec Exploration Branch, stated that the increase in proven geological reserves in the Tongnanba gas field further proves the exploration potential of the Xujiahe Formation in northern Sichuan. Next, Sinopec will continue to strengthen the integrated evaluation and deployment of exploration and development, expand the scale of the Tongnanba gas field, and create a new battlefield for scale increase and storage.
The Sichuan Basin is rich in natural gas resources. For many years, Sinopec has been continuously promoting oil and gas development in the Sichuan Basin, and has successively built two large marine carbonate gas fields, Puguang and Yuanba, as well as China's first shale gas field with a production capacity of over 10 billion cubic meters - Fuling shale gas field, and China's first deep shale gas field with proven reserves exceeding 100 billion cubic meters - Weirong shale gas field. At present, Sinopec has discovered nearly 3 trillion cubic meters of natural gas geological reserves in the Sichuan Basin, with an annual production of 26 billion cubic meters and a cumulative production of over 200 billion cubic meters of natural gas.